im not really sure either. from watching the vid heres what i gather:
1. you pilot a pseudo fzero car and race along a guitar hero fret board thats like an fzero track.
2. you want to collect the colored boxes.
3. the colored boxes you collect stack up under you on a board under you and give you points.

I bypass the beta thingie and it's quite easy.
Still got the files on my pc plus the how to make it work outside the beta period. Really fun game!
I could upload it if you guys want. Am i allowed to put a megaupload link here? Else i can send the link by pm.

I grabed your uploaded file.
Have'nt had the time to mess with it yet.
Ive really been wanting to try the game.
See if it runs on my computer anyway.

I thiink if it does go on sale I'll most likely buy it.
Tough it looks more like a musical version of klax with a jet car, ather than a harder to play racer like I was hoping.
It turns for ya, and you just collect junk :/
I know that sorta makes a track, but Im a racing junkie.

Still, I can only see it getting better in the final release.

Who knows, maybe with enough purchases they'll be able to get the game onto Wiiware or something or even make a sequel.